Study On The Compound Emulsion Of SiO₂/Polyacrylate

In this paper, the compound emulsion of SiO-2 sol/polyacrylate was synthesized via in-site emulsion polymerization using SiO₂ sol and acrylate monomers. Some factors effecting on the stability of the compound emulsion were discussed. It shows that the better reaction temperature is 75 °C. Compared with emulsifier—B and a blend emulsifier system (A/B), emulsifier—A is the more effective emulsifier. The potassium persulfate (KPS) is the more effective initiator compared with 2,2'-azobis(isobutyramidine) dihydrochloride (AIBA) and 2,2'-azo-bis-isobutyronitrile (AIBN). When content of A was between 0.45%⁰.7%, the content of KPS was 0.14% and the weight ratio of monomer to SiO₂ was 3, the compound emulsion of high SiO₂ sol/ Acrylic Resin, in which the amount of SiO₂ is 10%, was synthesized at 75°C. Its stability is good for use. The films of the compound emulsion show an excellent waterproof compared with those of the pure polyacrylate...